Update database folder for prod mode

[Neylix]

Description

For production, we add a specific folder to store the database, by default to ~/aebot instead of app dir

Fixes #461

Type of change

• Bug fix (non-breaking change which fixes an issue)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

How Has This Been Tested?

Runned a node with MIX_ENV=prod iex -S mix, ~/aebot/data folder was created and fillled with datas

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules